Power-to-gas is a concept to convert surplus of electricity either from renewable or conventional sources to chemical energy. There are two major processes in power-to-gas—electrolysis process and methanation process. From this, there are three types of electrolysis process, namely, alkaline, proton exchange membrane (PEM) and solid-oxide electrolysis. Methanation process is mainly of two types—thermocatalytic and biological methanation. Hopes for power to gas is immensely high as a clean method to store excess generated electricity, stabilize the power grid or redirect excess electricity toward other useful applications. With serious R&D efforts all over the world, technology readiness level (TRL) of power

Power-to-gas is a concept to convert surplus of electricity either from renewable or conventional sources to chemical energy. There are two major processes in power-to-gas—electrolysis process and methanation process. From this, there are three types of electrolysis process, namely, alkaline, proton exchange membrane (PEM) and solid-oxide electrolysis. Methanation process is mainly of two types—thermocatalytic and biological methanation. Hopes for power to gas is immensely high as a clean method to store excess generated electricity, stabilize the power grid or redirect excess electricity toward other useful applications. With serious R&D efforts all over the world, technology readiness level (TRL) of power-to-gas is expected to speed up, thus establishing a complete system in the near future.